If they did it for a week straight after you'd lodged several noise complaints and had the police go nowhere, yeah, I think that would qualify. It's certainly not the most severe type of torture but intentionally depriving a person of sleep and attempting to damage their eardrums qualifies.
If your loud college neighbours were setting off a train horn outside your building, repeatedly, I think you'd expect them to be handled by the police (if not arrested) pretty immediately.
If your loud college neighbours were assaulting people in the streets, shouting death and rape threats at you, you'd probably consider them violent.[1] Another post of mine has many more links if you're interested.
I'm not sure how much actual violence is required for a protest to become violent. Is it just that nobody's been killed yet? That seems to be what everyone is waiting for and I sincerely hope we don't get there (thankfully it looks like things may be defusing today).
[1]: https://globalnews.ca/news/8594809/covid-freedom-convoy-otta...
Dictionaries, on the other hand, define torture as "inflicting pain and suffering on".
The UN Conventions on Torture in no way specify that imprisonment, formal or otherwise, is a required component for something to be defined as torture.
So my opinion is that your vision of torture in this instance is far more narrow, because it fits your worldview more.
I assume (charitably) they mean it in a hyperbolic sense
Why did you use the word torture here? Torture is a well-defined word with an accepted meaning. Do you feel that it is appropriate? Or are you looking for an emotionally-loaded reaction? Can I also claim that my loud college neighbors are torturing me when they stay up too late on the weekend? Of course I can, but it sure is disingenuous to anyone who has actually been tortured.